Grate.



No. 700,06I. I v Pat ented ma ,|3-,.|9o2. T. u. was.

. GRATE.

(Application filed thine a, 1901 (No Model.)

& IIIU IZJ BYW' ' AHDRNEYS' UNITED STATES PATENT OFF E.

THOMAS HOOKING LUCAS, OF MINNEAPOLIS, MINNESOTA.

G'RATE.

SPECIFICATION forming part of Letters Patent No, 700,061, dated Mayil'S, 1902. Application filed June 3,1901. semi No. 62,969. (No a i.)

T aZZ whom it mag concern.-

Be it known that I, THOMAS HOOKING LU- GAS, of Minneapolis, in the county of Hennepin and State of Minnesota, have invented a new and useful Improvement in Grates, of which the following is a specification.

My inventionis an improvement in grates, and has for an object to provide a simple easily-operated grate especially adapted for burning fine and crumbling fuel, such as peat, sawdust, lignite, bituminous slack, and anthracite pea coal. experienced in theburningof this class of fuel from the fine particles falling unconsumed through the grate whenever an attempt is madeto remove the ashes, thus wasting a.

large quantity of fuel. This-is particularly the case with lignite, which crumbles as soon as it comes in contact-with'heauand any agitationof the fire'willcause the fine particles to fall through the grate with the ashes, leaving on the grate the coarser pieces which have not ignited to'smolder and emit a very offensive gas that would otherwisebe consumed by the combustion ofthe finer parti cles could they be retained.

The purpose of my invent-ion, thereforefis to provide a grate capable of retaining fall fuel until consumed to ashes and then tore: move the ashes without interfering with the uncomsumed fuel.

The invention consists in certain novel constructions and combinations of parts, as will be hereinafter described and claimed. I

In the drawings, Figure 1 is a vertical crosssection of my grate on about line 11 of Fig.

3. Fig. 2 is a detail plan view of the shaker,

section. Fig. 3 is a top plan view of the grate,

and Fig. 4 is a bottom plan View of the grate Af difficulty has been charge the ashes more rapidly or when any foreign substance may have been introduced into the fire-pot.

The main or fixed section A is in the form of a basket depressed toward its bottom and having its sides composed of bars A, inclining inwardly towardits bottom, as shown. The bottom comprises a frame A which is crossed from side to side by bars a which are spaced apart at a sufficiently (see Fig. 5) to permit a quick discharge of the contents of the grate when themovable section B is adj usted to expose the said spaces a between the barsa j The shaker-section Bhas a-handle B, a frame B that normally underlies the frame A of the bottom, and end harsh and crossbars I), one for 'each of the spaces 0 so the sections B can be adjusted, as shown in Fig. 4, to extend across and nearly close'the openings a as .will be seen in the said figure.

' Connectingdevices'are provided between the shaker-section B and fixed section A, so

the former can be moved revolubly or back and forth, as may-be desired.

In connecting'the sections A and B, I prefer to provide a pivot-stud 0, depending from the un der side of the section A and forming a journal for the section B, so the latter can rock, its bearing-opening for the stud or shaft 0 being a slot D, elongated from front to rear to permit the back-and-forth reciprocating movement of the section B before described. Nowin operation, when the parts are adjusted as shown in Fig. 4 the openings in the bottom of the grate are so slight as to prevent the escape of the finely-divided fuel and at ICO Having thus described my invention, what I claim as new, and desire to secure by Letters Patent, is

1. The grate herein described comprising the main or basket section having a bottom frame provided with cross-bars spaced apart and with side bars inclining inwardly toward the bottom frame, a depending pivot-stud on the bottom frame, and the shaker having a handle and a frame and cross-bars adapted to partly close the spaces between the bars of the bottom of the main section and a bearing opening or slot for the pivot-stud elongated from front to rear whereby the shaker-section can be oscillated with respect to a vertical axis and reciprocated, substantially as set forth.

2. The combination of the main or basket section provided with side bars and with the flat bottom having cross-bars, and the sh akersection supported below said bottom and capable of oscillating with respect to a vertical axis and reciprocating substantially as set .forth.

The grate herein described having the 'main section provided with a bottom having openings, and the shaker-section supported to oscillate with respect to a vertical axis and to reciprocate beneath said bottom substantially as set forth.

4. The combination of the grate-section having a depressed or basket form, and the shaker arranged close beneath the grate-section and capable of oscillating with respect to a vertical axis andof reciprocating substantially asset forth.

5. The combination of a fixed or main gratesectionhavinga depressed or basket form and a movable shaker close beneath said section and capable of oscillating with respect to a vertical axis and of reciprocating substantially as set forth.

6. A grate comprising the main section having its bottom formed of cross-bars spaced apart, and the shaker-section supported close below the said bottom and having its crossbars formed to partly close the spaces between those of the grate-bottom, such shaker being capable of oscillating with respect to a vertical axis and of reciprocating substantially as set forth.

7. A grate composed of a main fixed section and a shaker-section below the fixed section, the entire shaker-section being arranged and supported to oscillate with respect to a vertical axis and to reciprocate beneath the fixed section substantially as set forth.

8. The combination of -the fixedsection having a stud and a shaker-section having an elongated openingor slot receiving the stud, whereby the shaker-section can be oscillated with respect to a vertical axis and reciprocated, substantially asset forth.

9. The grate herein described, comprising the basket-section having its bottom formed with cross-bars, and providedon said bottom with a depending pivot stud, and a shaker comprising a frame and cross-bars, and :provided with a vertical opening-fortheipassage of the stud of the basket-frame,-said opening being elongated whereby the shaker-section can be oscillated around the pivot-stud as a vertical axis, and can be reciprocated below the basket-section substantially as set forth.

THOMAS HOOKING :LUOAS.

Witnesses:

WILLIAM BERG, IDA DAHLGREN. 

